Added some missing #includes

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403304

dlib/svm/empirical_kernel_map.h

@@ -8,6 +8,7 @@
 #include <vector>
 #include "../algs.h"
 #include "kernel_matrix.h"
+#include "function.h"
 
 namespace dlib
 {

dlib/svm/empirical_kernel_map_abstract.h

@@ -6,6 +6,7 @@
 #include <vector>
 #include "../matrix.h"
 #include "kernel_abstract.h"
+#include "function_abstract.h"
 #include <vector>
 
 namespace dlib